providers/implementations/serializers/serializer_dsa.c

   1 /*
   2  * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * DSA low level APIs are deprecated for public use, but still ok for
  12  * internal use.
  13  */
  14 #include "internal/deprecated.h"
  15
  16 #include <openssl/dsa.h>
  17 #include <openssl/err.h>
  18 #include "prov/bio.h"             /* ossl_prov_bio_printf() */
  19 #include "prov/implementations.h" /* rsa_keymgmt_functions */
  20 #include "prov/providercommonerr.h" /* PROV_R_BN_ERROR */
  21 #include "serializer_local.h"
  22 #include "internal/ffc.h"
  23 #include "crypto/dsa.h"
  24
  25 OSSL_OP_keymgmt_new_fn *ossl_prov_get_keymgmt_dsa_new(void)
  26 {
  27     return ossl_prov_get_keymgmt_new(dsa_keymgmt_functions);
  28 }
  29
  30 OSSL_OP_keymgmt_free_fn *ossl_prov_get_keymgmt_dsa_free(void)
  31 {
  32     return ossl_prov_get_keymgmt_free(dsa_keymgmt_functions);
  33 }
  34
  35 OSSL_OP_keymgmt_import_fn *ossl_prov_get_keymgmt_dsa_import(void)
  36 {
  37     return ossl_prov_get_keymgmt_import(dsa_keymgmt_functions);
  38 }
  39
  40 int ossl_prov_print_dsa(BIO *out, DSA *dsa, enum dsa_print_type type)
  41 {
  42     const char *type_label = NULL;
  43     const BIGNUM *priv_key = NULL, *pub_key = NULL;
  44     const BIGNUM *p = NULL;
  45
  46
  47     switch (type) {
  48     case dsa_print_priv:
  49         type_label = "Private-Key";
  50         break;
  51     case dsa_print_pub:
  52         type_label = "Public-Key";
  53         break;
  54     case dsa_print_params:
  55         type_label = "DSA-Parameters";
  56         break;
  57     }
  58
  59     if (type == dsa_print_priv) {
  60         priv_key = DSA_get0_priv_key(dsa);
  61         if (priv_key == NULL)
  62             goto null_err;
  63     }
  64
  65     if (type == dsa_print_priv || type == dsa_print_pub) {
  66         pub_key = DSA_get0_pub_key(dsa);
  67         if (pub_key == NULL)
  68             goto null_err;
  69     }
  70
  71
  72     p = DSA_get0_p(dsa);
  73     if (p == NULL)
  74         goto null_err;
  75
  76     if (ossl_prov_bio_printf(out, "%s: (%d bit)\n", type_label,
  77                              BN_num_bits(p)) <= 0)
  78         goto err;
  79     if (priv_key != NULL
  80         && !ossl_prov_print_labeled_bignum(out, "priv:", priv_key))
  81         goto err;
  82     if (pub_key != NULL
  83         && !ossl_prov_print_labeled_bignum(out, "pub: ", pub_key))
  84         goto err;
  85     if (!ffc_params_prov_print(out, dsa_get0_params(dsa)))
  86         goto err;
  87
  88     return 1;
  89  err:
  90     return 0;
  91  null_err:
  92     ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_NULL_PARAMETER);
  93     goto err;
  94 }
  95
  96 int ossl_prov_prepare_dsa_params(const void *dsa, int nid,
  97                                  void **pstr, int *pstrtype)
  98 {
  99     ASN1_STRING *params = ASN1_STRING_new();
 100
 101     if (params == NULL) {
 102         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 103         return 0;
 104     }
 105
 106     params->length = i2d_DSAparams(dsa, &params->data);
 107
 108     if (params->length <= 0) {
 109         ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
 110         ASN1_STRING_free(params);
 111         return 0;
 112     }
 113
 114     *pstrtype = V_ASN1_SEQUENCE;
 115     *pstr = params;
 116     return 1;
 117 }
 118
 119 int ossl_prov_prepare_all_dsa_params(const void *dsa, int nid,
 120                                      void **pstr, int *pstrtype)
 121 {
 122     const BIGNUM *p = DSA_get0_p(dsa);
 123     const BIGNUM *q = DSA_get0_q(dsa);
 124     const BIGNUM *g = DSA_get0_g(dsa);
 125
 126     if (p != NULL && q != NULL && g != NULL)
 127         return ossl_prov_prepare_dsa_params(dsa, nid, pstr, pstrtype);
 128
 129     *pstr = NULL;
 130     *pstrtype = V_ASN1_UNDEF;
 131     return 1;
 132 }
 133
 134 int ossl_prov_dsa_pub_to_der(const void *dsa, unsigned char **pder)
 135 {
 136     ASN1_INTEGER *pub_key = BN_to_ASN1_INTEGER(DSA_get0_pub_key(dsa), NULL);
 137     int ret;
 138
 139     if (pub_key == NULL) {
 140         ERR_raise(ERR_LIB_PROV, PROV_R_BN_ERROR);
 141         return 0;
 142     }
 143
 144     ret = i2d_ASN1_INTEGER(pub_key, pder);
 145
 146     ASN1_STRING_clear_free(pub_key);
 147     return ret;
 148 }
 149
 150 int ossl_prov_dsa_priv_to_der(const void *dsa, unsigned char **pder)
 151 {
 152     ASN1_INTEGER *priv_key = BN_to_ASN1_INTEGER(DSA_get0_priv_key(dsa), NULL);
 153     int ret;
 154
 155     if (priv_key == NULL) {
 156         ERR_raise(ERR_LIB_PROV, PROV_R_BN_ERROR);
 157         return 0;
 158     }
 159
 160     ret = i2d_ASN1_INTEGER(priv_key, pder);
 161
 162     ASN1_STRING_clear_free(priv_key);
 163     return ret;
 164 }